tuner-core was checking if analog_ops->set_config is set.  If set, it would
complain that it isn't.  Fix this backwards logic to the proper behavior.
Signed-off-by: NMichael Krufky <mkrufky@linuxtv.org>
Signed-off-by: NMauro Carvalho Chehab <mchehab@infradead.org>